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Home › Gemstones › Natural Untreated Gemstones

Natural Untreated Gemstones

Discover genuine untreated gemstones selected for natural beauty, rarity, and authenticity.

Natural Untreated Gemstones Weight
Natural Untreated Gemstones Size
Natural Untreated Gemstones Clarity
Natural Untreated Gemstones Price
Natural Untreated Gemstones Treatment

Size Explained

Choose Size or Size Range
For Example: 6-7
For Example: 8-9
Bi-color Natural Untreated Gemstones
Black Natural Untreated Gemstones
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Golden Natural Untreated Gemstones
Gray Natural Untreated Gemstones
Green Natural Untreated Gemstones
Multicolor Natural Untreated Gemstones
Orange Natural Untreated Gemstones
Pink Natural Untreated Gemstones
Purple Natural Untreated Gemstones
Red Natural Untreated Gemstones
Turquoise Natural Untreated Gemstones
Violet Natural Untreated Gemstones
White Natural Untreated Gemstones
Yellow Natural Untreated Gemstones
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118.34ct Turquoise Amazonite, Square, Opaque
Amazonite Product Video (753196)

118.34ct Turquoise Amazonite, Square, Opaque

28.8 x 28.7 mm

$ 68.76

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2.13ct Orange Zircon, Oval, VS

2.13ct Orange Zircon, Oval, VS

7.7 x 6.4 mm

$ 58.35

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4.75ctw Green Prehnite, Round, Transparent

4.75ctw Green Prehnite, Round, Transparent

7.5 mm (calibrated)

$ 25.81

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3.70ctw White Topaz, Square, VS-SI

3.70ctw White Topaz, Square, VS-SI

3.6 x 3.5 mm

$ 28.77

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0.47ct White Rainbow Moonstone, Baguette, Transparent

0.47ct White Rainbow Moonstone, Baguette, Transparent

5.8 x 3.7 mm

$ 13.65

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18.95ct Orange Moonstone, Round, Translucent

18.95ct Orange Moonstone, Round, Translucent

19 mm (calibrated)

$ 37.94

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2.64ct Brown Tiger'S Eye, Oval, Opaque

2.64ct Brown Tiger'S Eye, Oval, Opaque

9 x 7 mm (calibrated)

$ 2.63

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5.78ct Yellow Citrine, Oval, VS

5.78ct Yellow Citrine, Oval, VS

14 x 10 mm (calibrated)

$ 52.02

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5.46ct Multicolor Fire Agate, Fancy, Opaque

5.46ct Multicolor Fire Agate, Fancy, Opaque

17.1 x 10.6 mm

$ 40.30

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1.13ct Purple Spinel, Cushion, VVS-VS
Spinel Product Video (720487)

1.13ct Purple Spinel, Cushion, VVS-VS

6.4 x 5.8 mm

$ 168.82

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1.72ct Pink Strawberry Quartz, Round, Translucent

1.72ct Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 13.19

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10.77ctw Orange Moonstone, Flower Cut, Translucent

10.77ctw Orange Moonstone, Flower Cut, Translucent

10 x 10 mm (calibrated)

$ 21.46

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1.84ct White Sillimanite Cat'S Eye, Oval, Translucent

1.84ct White Sillimanite Cat'S Eye, Oval, Translucent

8 x 6 mm (calibrated)

$ 14.11

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24.25ct Violet Amethyst, Emerald Cut, VVS

24.25ct Violet Amethyst, Emerald Cut, VVS

20 x 15 mm (calibrated)

$ 169.07

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0.79ct Orange Sphalerite, Round, SI-I1

0.79ct Orange Sphalerite, Round, SI-I1

5.5 mm (calibrated)

$ 39.34

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1.21ct Green Tourmaline, Emerald Cut, VVS-VS

1.21ct Green Tourmaline, Emerald Cut, VVS-VS

14.9 x 3.2 mm

$ 29.17

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0.27ct Black Diamond, Square, Opaque

0.27ct Black Diamond, Square, Opaque

3 x 3 mm (calibrated)

$ 134.46

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28.88ctw Multicolor Fossil Coral, Oval, Opaque

28.88ctw Multicolor Fossil Coral, Oval, Opaque

20 x 15 mm (calibrated)

$ 56.95

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2.01ct Violet Amethyst, Marquise, VVS

2.01ct Violet Amethyst, Marquise, VVS

20.3 x 5.1 mm

$ 14.01

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1.43ctw Red Rhodolite Garnet, Square, VS

1.43ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 12.52

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2.32ct Green Malachite, Oval, Opaque

2.32ct Green Malachite, Oval, Opaque

8.9 x 6.7 mm

$ 1.78

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1.68ct Orange Hessonite Garnet, Square, SI

1.68ct Orange Hessonite Garnet, Square, SI

6 x 6 mm (calibrated)

$ 28.18

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1.73ctw Green Demantoid Garnet, Oval, VS
Demantoid Garnet Product Video (461710)

1.73ctw Green Demantoid Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 189.54

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2.21ct Red Almandine Garnet, Oval, VVS-VS

2.21ct Red Almandine Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 82.54

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Why Buy Natural Untreated Gemstones from GemSelect?

Why Choose Untreated Gemstones?

Untreated gemstones are valued for their natural color and clarity without artificial enhancement. Many buyers prefer these gems for authenticity, rarity, and long-term value.

Natural Loose Untreated Gems Online

Shop loose untreated gemstones online at GemSelect with confidence. Browse sapphires, rubies, spinels, aquamarine, garnet, tourmaline, and more with full disclosure.

Natural Untreated Gemstones for Jewelry and Collecting

Untreated Gemstones for Jewelry

Natural untreated gems are excellent for rings, earrings, pendants, and custom jewelry. Their original beauty makes every piece unique and meaningful.

Popular Untreated Gemstone Types

Popular choices include untreated sapphire, ruby, spinel, garnet, tourmaline, zircon, aquamarine, and many collector stones in a wide range of colors.

Certified Natural Gemstones

Many buyers choose untreated gemstones with gemological reports for added confidence. Certification can confirm identity and indicate whether treatments are present.

Collector Quality Untreated Gems

Collectors appreciate untreated gemstones because naturally fine examples are rarer than treated material. These stones can be especially desirable when color and clarity are strong.

Calibrated Untreated Gemstones

We also offer calibrated untreated gemstones in popular sizes suitable for standard jewelry settings, making custom designs easier and faster.

Worldwide Shipping from GemSelect

GemSelect offers secure online ordering, detailed product images, and worldwide delivery so you can shop untreated gemstones from anywhere.

Learn more about gemstone treatments, identification, and care on our Gemstone Information Pages.

FAQs

What does untreated gemstone mean?

An untreated gemstone has not undergone enhancement processes such as heating, dyeing, filling, coating, or diffusion to improve appearance.

Are untreated gemstones more valuable?

Often yes, especially in sapphire, ruby, and other premium gems where fine untreated stones are rarer than treated examples.

How can I verify a gemstone is untreated?

Independent laboratory certification is the best way to verify whether a gemstone is natural and untreated.

Which gemstones are commonly sold untreated?

Spinel, garnet, zircon, tourmaline, aquamarine, and some sapphires or rubies are often available untreated depending on source and quality.

Are all untreated gemstones natural?

Natural untreated gemstones are mined stones that have not been enhanced after cutting. Always buy from trusted sellers with clear disclosure.

GemSelect Certified Store Reviews

GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!

Overall Rating -> 10 star ratings

All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.

Posted By Bob D in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

No problems. I had a minor address issue in the past and someone got back to me very quickly and we resolved the issue satisfactorily. I appreciated the quick, concerned response. So important when buyer/seller are so far apart in distance. Thank you Gem Select. Keep up the good work!

Posted By Orphanboy in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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